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Struct pallet_timestamp::pallet::Pallet

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pub struct Pallet<T>(/* private fields */);
Expand description

The Pallet struct, the main type that implements traits and standalone functions within the pallet.

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impl<T: Config> Pallet<T>

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pub fn set(origin: OriginFor<T>, now: T::Moment) -> DispatchResult

Set the current time.

This call should be invoked exactly once per block. It will panic at the finalization phase, if this call hasn’t been invoked by that time.

The timestamp should be greater than the previous one by the amount specified by Config::MinimumPeriod.

The dispatch origin for this call must be None.

This dispatch class is Mandatory to ensure it gets executed in the block. Be aware that changing the complexity of this call could result exhausting the resources in a block to execute any other calls.

§Complexity
  • O(1) (Note that implementations of OnTimestampSet must also be O(1))
  • 1 storage read and 1 storage mutation (codec O(1) because of DidUpdate::take in on_finalize)
  • 1 event handler on_timestamp_set. Must be O(1).
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impl<T: Config> Pallet<T>

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pub fn get() -> T::Moment

Get the current time for the current block.

NOTE: if this function is called prior to setting the timestamp, it will return the timestamp of the previous block.

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pub fn set_timestamp(now: T::Moment)

Set the timestamp to something in particular. Only used for tests.

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impl<T: Config> BeforeAllRuntimeMigrations for Pallet<T>

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fn before_all_runtime_migrations() -> Weight

Something that should happen before runtime migrations are executed.
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impl<T> Benchmarking for Pallet<T>
where T: Config + Config,

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fn benchmarks(extra: bool) -> Vec<BenchmarkMetadata>

Get the benchmarks available for this pallet. Generally there is one benchmark per extrinsic, so these are sometimes just called “extrinsics”. Read more
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fn run_benchmark( extrinsic: &[u8], c: &[(BenchmarkParameter, u32)], whitelist: &[TrackedStorageKey], verify: bool, internal_repeats: u32, ) -> Result<Vec<BenchmarkResult>, BenchmarkError>

Run the benchmarks for this pallet.
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impl<T: Config> Callable<T> for Pallet<T>

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impl<T> Clone for Pallet<T>

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T> Debug for Pallet<T>

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fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<T: Config> GetStorageVersion for Pallet<T>

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type InCodeStorageVersion = NoStorageVersionSet

This type is generated by the pallet macro. Read more
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fn in_code_storage_version() -> Self::InCodeStorageVersion

Returns the in-code storage version as specified in the storage_version attribute, or [NoStorageVersionSet] if the attribute is missing.
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fn on_chain_storage_version() -> StorageVersion

Returns the storage version of the pallet as last set in the actual on-chain storage.
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fn current_storage_version() -> Self::InCodeStorageVersion

👎Deprecated: This method has been renamed to in_code_storage_version and will be removed after March 2024.
DEPRECATED: Use [Self::current_storage_version] instead. Read more
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impl<T: Config> Hooks<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

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fn on_initialize(_n: BlockNumberFor<T>) -> Weight

A dummy on_initialize to return the amount of weight that on_finalize requires to execute.

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fn on_finalize(_n: BlockNumberFor<T>)

At the end of block execution, the on_finalize hook checks that the timestamp was updated. Upon success, it removes the boolean value from storage. If the value resolves to false, the pallet will panic.

§Complexity
  • O(1)
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fn on_idle(_n: BlockNumber, _remaining_weight: Weight) -> Weight

Hook to consume a block’s idle time. This will run when the block is being finalized (before [Hooks::on_finalize]). Read more
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fn on_poll(_n: BlockNumber, _weight: &mut WeightMeter)

A hook to run logic after inherent application. Read more
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fn on_runtime_upgrade() -> Weight

Hook executed when a code change (aka. a “runtime upgrade”) is detected by the FRAME Executive pallet. Read more
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fn try_state(_n: BlockNumber) -> Result<(), DispatchError>

Execute the sanity checks of this pallet, per block. Read more
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fn pre_upgrade() -> Result<Vec<u8>, DispatchError>

Execute some pre-checks prior to a runtime upgrade. Read more
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fn post_upgrade(_state: Vec<u8>) -> Result<(), DispatchError>

Execute some post-checks after a runtime upgrade. Read more
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fn offchain_worker(_n: BlockNumber)

Implementing this function on a pallet allows you to perform long-running tasks that are dispatched as separate threads, and entirely independent of the main blockchain execution. Read more
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fn integrity_test()

Check the integrity of this pallet’s configuration. Read more
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impl<T: Config> IntegrityTest for Pallet<T>

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fn integrity_test()

See [Hooks::integrity_test].
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impl<T: Config> OffchainWorker<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

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fn offchain_worker(n: BlockNumberFor<T>)

This function is being called after every block import (when fully synced). Read more
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impl<T: Config> OnFinalize<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

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fn on_finalize(n: BlockNumberFor<T>)

See [Hooks::on_finalize].
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impl<T: Config> OnGenesis for Pallet<T>

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fn on_genesis()

Something that should happen at genesis.
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impl<T: Config> OnIdle<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

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fn on_idle(n: BlockNumberFor<T>, remaining_weight: Weight) -> Weight

See [Hooks::on_idle].
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impl<T: Config> OnInitialize<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

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fn on_initialize(n: BlockNumberFor<T>) -> Weight

See [Hooks::on_initialize].
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impl<T: Config> OnPoll<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

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fn on_poll(n: BlockNumberFor<T>, weight: &mut WeightMeter)

Code to execute every now and then at the beginning of the block after inherent application. Read more
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impl<T: Config> OnRuntimeUpgrade for Pallet<T>

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fn on_runtime_upgrade() -> Weight

See [Hooks::on_runtime_upgrade].
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fn pre_upgrade() -> Result<Vec<u8>, TryRuntimeError>

See [Hooks::pre_upgrade].
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fn post_upgrade(state: Vec<u8>) -> Result<(), TryRuntimeError>

See [Hooks::post_upgrade].
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fn try_on_runtime_upgrade(checks: bool) -> Result<Weight, DispatchError>

The expected and default behavior of this method is to handle executing pre_upgrade -> on_runtime_upgrade -> post_upgrade hooks for a migration. Read more
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impl<T: Config> PalletInfoAccess for Pallet<T>

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fn index() -> usize

Index of the pallet as configured in the runtime.
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fn name() -> &'static str

Name of the pallet as configured in the runtime.
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fn name_hash() -> [u8; 16]

Two128 hash of name.
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fn module_name() -> &'static str

Name of the Rust module containing the pallet.
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fn crate_version() -> CrateVersion

Version of the crate containing the pallet.
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impl<T: Config> PalletsInfoAccess for Pallet<T>

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fn count() -> usize

The number of pallets’ information that this type represents. Read more
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fn infos() -> Vec<PalletInfoData>

All of the pallets’ information that this type represents.
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impl<T> PartialEq for Pallet<T>

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fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T: Config> ProvideInherent for Pallet<T>

To check the inherent is valid, we simply take the max value between the current timestamp and the current timestamp plus the Config::MinimumPeriod. We also check that the timestamp has not already been set in this block.

§Errors:
  • [InherentError::TooFarInFuture]: If the timestamp is larger than the current timestamp + minimum drift period.
  • [InherentError::TooEarly]: If the timestamp is less than the current + minimum period.
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type Call = Call<T>

The call type of the pallet.
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type Error = InherentError

The error returned by check_inherent.
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const INHERENT_IDENTIFIER: InherentIdentifier = INHERENT_IDENTIFIER

The inherent identifier used by this inherent.
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fn create_inherent(data: &InherentData) -> Option<Self::Call>

Create an inherent out of the given InherentData. Read more
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fn check_inherent( call: &Self::Call, data: &InherentData, ) -> Result<(), Self::Error>

Check whether the given inherent is valid. Checking the inherent is optional and can be omitted by using the default implementation. Read more
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fn is_inherent(call: &Self::Call) -> bool

Return whether the call is an inherent call. Read more
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fn is_inherent_required( _: &InherentData, ) -> Result<Option<Self::Error>, Self::Error>

Determines whether this inherent is required in this block. Read more
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impl<T: Config> StorageInfoTrait for Pallet<T>

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fn storage_info() -> Vec<StorageInfo>

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impl<T: Config> Time for Pallet<T>

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type Moment = <T as Config>::Moment

A type that represents a unit of time.

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fn now() -> Self::Moment

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impl<T: Config> TryDecodeEntireStorage for Pallet<T>

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fn try_decode_entire_state() -> Result<usize, Vec<TryDecodeEntireStorageError>>

Decode the entire data under the given storage, returning Ok(bytes_decoded) if success.
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impl<T: Config> TryState<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

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fn try_state( n: BlockNumberFor<T>, _s: TryStateSelect, ) -> Result<(), TryRuntimeError>

Execute the state checks.
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impl<T: Config> UnixTime for Pallet<T>

Before the timestamp inherent is applied, it returns the time of previous block.

On genesis the time returned is not valid.

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fn now() -> Duration

Return duration since SystemTime::UNIX_EPOCH.
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impl<T: Config> WhitelistedStorageKeys for Pallet<T>

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fn whitelisted_storage_keys() -> Vec<TrackedStorageKey>

Returns a Vec<TrackedStorageKey> indicating the storage keys that should be whitelisted during benchmarking. This means that those keys will be excluded from the benchmarking performance calculation.
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impl<T> Eq for Pallet<T>

Auto Trait Implementations§

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impl<T> Freeze for Pallet<T>

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impl<T> RefUnwindSafe for Pallet<T>
where T: RefUnwindSafe,

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impl<T> Send for Pallet<T>
where T: Send,

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impl<T> Sync for Pallet<T>
where T: Sync,

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impl<T> Unpin for Pallet<T>
where T: Unpin,

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impl<T> UnwindSafe for Pallet<T>
where T: UnwindSafe,

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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fn checked_from<T>(t: T) -> Option<Self>
where Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more
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where Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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where Self: Into<T>,

Converts self into T using Into<T>. Read more
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fn __clone_box(&self, _: Private) -> *mut ()

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Checks if this value is equivalent to the given key. Read more
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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Causes self to use its Display implementation when Debug-formatted.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> JsonSchemaMaybe for T

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impl<T> MaybeDebug for T
where T: Debug,

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impl<T> MaybeRefUnwindSafe for T
where T: RefUnwindSafe,

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impl<T> MaybeRefUnwindSafe for T
where T: RefUnwindSafe,

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impl<T> Member for T
where T: Send + Sync + Debug + Eq + PartialEq + Clone + 'static,

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impl<T> Scalar for T
where T: 'static + Clone + PartialEq + Debug,